Color

#1b87da

#1b87da
hex#1b87da
rgbrgb(27, 135, 218)
hslhsl(206, 78%, 48%)
oklchoklch(0.608 0.155 248.2)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2262

Colors that go with #1b87da

Charcoal, Crimson and Copper lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#da6e1b

#1bdacd · #1b28da

#da1b87 · #87da1b

Split-complementary

Open in tool →

#da1b28 · #dacd1b

#cd1bda · #da6e1b · #28da1b

Contrast

#1b87da as textRatioAAAA largeAAAFix
Aaon white
3.8:1failpassfail
  • AA: use #1879c3 as the text (4.6:1)
  • AAA: use #125a91 as the text (7.25:1)
  • AA: or shift the background to #1a1a1a (4.58:1)
Aaon black
5.52:1passpassfail
  • AAA: use #3c9de7 as the text (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b87da as the background.

Brands using this color

Fonts for this mood

#1b87da reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b87da
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #1b87da and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b87da-9caec4-df4e56-1f212d-e9f1f1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md